TRANSFORMATION SEQUENCE IN A Cu-Al-Ni SHAPE MEMORY ALLOY AT ELEVATED TEMPERATURES.

Jogender Singh, Haydn Chen, C. M. Wayman

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Precipitation sequences in a Cu-14 pct Al-4 pct Ni (wt pct) shape memory alloy were studied by means of transmission electron diffraction and microscopy as well as X-ray microanalysis techniques. On aging thin foil specimens up to 550 degree C in the electron microscope, an as-quenched sample having a mixture of 2H-type and DO//3-type metastable structures transformed to the stable simple cubic gamma //2 phase at or above 450 degree C. The remaining matrix either showed precipitates of the fcc alpha -phase on prolonged annealing at 500 to 550 degree C for a longer period, or transformed to martensite on cooling below the M//s temperature (approx. 150 degree C.

Original languageEnglish (US)
Pages (from-to)65-72
Number of pages8
JournalMetallurgical transactions. A, Physical metallurgy and materials science
Volume17 A
Issue number1
DOIs
StatePublished - Jan 1 1986

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Microanalysis
shape memory alloys
martensite
microanalysis
Shape memory effect
Martensite
Electron diffraction
Metal foil
Electron microscopy
Precipitates
precipitates
foils
electron microscopy
Electron microscopes
electron diffraction
electron microscopes
Aging of materials
Annealing
Cooling
cooling

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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TRANSFORMATION SEQUENCE IN A Cu-Al-Ni SHAPE MEMORY ALLOY AT ELEVATED TEMPERATURES. / Singh, Jogender; Chen, Haydn; Wayman, C. M.

In: Metallurgical transactions. A, Physical metallurgy and materials science, Vol. 17 A, No. 1, 01.01.1986, p. 65-72.

Research output: Contribution to journalArticle

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